Comments on: Replacing fluorescent lamp with LED

By: Tomi Engdahl

Tomi Engdahl — Mon, 26 Nov 2018 16:06:32 +0000

Modifying an old light with LED tape.
https://www.youtube.com/watch?v=7_ds5XFJvPs

This was just a spontaneous fix of an irksome slimline fluorescent fitting that I decided to convert to a lower intensity light with some LED strip.
My use of the current regulated supply isn’t ideal since it means that if sections of LEDs fail the current through the remaining ones will increase. It was just hard finding a tiny 12V supply that would fit inside the slim casing.

By: Tomi Engdahl

Tomi Engdahl — Mon, 26 Nov 2018 15:29:55 +0000

Can LED strip lights replace Fluorescent!? (WnW #46)
https://www.youtube.com/watch?v=yeC4tXANdv4

Today I ask the question… can these LED strip lights be used in place of regular lights?

By: Scarlett Craghead

Scarlett Craghead — Thu, 17 Oct 2013 17:14:49 +0000

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By: Tomi Engdahl

Tomi Engdahl — Tue, 10 Sep 2013 08:53:13 +0000

NASA’s headquarters to change the LED lights

lso, the large state enterprises have to save money. The U.S. space agency NASA administration to take their own headquarters to do their saving efforts by changing the lighting to LED based.

Cree says that NASA’s Washington, DC headquarters in all fluorescent lamps will be replaced by the company’s CR series led lamps.

Replacing the LED lights will save the head office lighting costs up to 52 percent a year, Cree says

Cree says that its led lamps last 50 000 hours of service life (about twice as high compared to traditional fluorescent tubes).

The new lighting installation represents of course a great deal of cost to NASA.

Source: http://www.etn.fi/index.php?option=com_content&view=article&id=335:nasan-paakonttori-vaihtaa-ledvaloon&catid=13&Itemid=101

By: gratisseks

gratisseks — Wed, 14 Aug 2013 11:18:21 +0000

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By: Tomi Engdahl

Tomi Engdahl — Thu, 02 May 2013 10:36:41 +0000

This product has worked nicely for more than 1.5 years now.
No problems. Seems to be solid product.

By: Tomi Engdahl

Tomi Engdahl — Fri, 17 Aug 2012 05:11:19 +0000

Sorry I can’t.
I don’t sell those LED tubes.
The article has link to the place I got mine…

By: Nifty

Nifty — Thu, 16 Aug 2012 07:58:11 +0000

Dear,

Can you send us your newest quotation of led tubes.

Thanks & best regards,
Nifty

By: bel islive

bel islive — Wed, 27 Jun 2012 18:45:19 +0000

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By: Tomi Engdahl

Tomi Engdahl — Tue, 10 Apr 2012 08:19:28 +0000

Lumileds’ mid-power 5630 LED aims at office lighting
http://www.edn.com/blog/PowerSource/41713-Lumileds_mid_power_5630_LED_aims_at_office_lighting.php?cid=EDNToday_20120409

The Lumileds 5630 is Philips Lumileds’ first white, mid-power LED, targeting the office lighting space (troffers and tube lights) and other distributed LED lighting applications. A mid-power LED is one designed to operate at around 100-150mA, as opposed to high-brightness (HB) LEDs which are spec’d at 350mA and routinely go to 1A. Offered in the full CCT range from 2700K-6500K with a high efficacy of 110 lm/W at 100mA, the devices have a minimum 80 CRI, 82 typical. (The guaranteed minimum lumens at 100mA is 26lm; 30lm for higher CCTs.)

Why are mid-range LEDs a good fit for office lighting? Office light is usually omnidirectional, such as you’d expect from a fluorescent tube. HB LEDs show up as an intense point source of light, which can be a distraction – it’s just not what people expect from their office lighting. Hence the softer, mid-power LEDs.